Interesting that you name them 'together'. On the surface, they are doing quite different things. On a deeper level, it seems to me, they approaching things in a very similar manner. I think what they share is a style of work very detached from the hectic, local improvement approach, which is usually forced upon us in industry for efficiency reasons. They inspiringly take their time to dig deep to identify hidden assumptions to get to the root causes of problems. Quite in the sense of the artist or scientist Bertrand Russell thought of. http://downloads.bbc.co.uk/rmhttp/radio4/transcripts/1948_re...
At a deeper level they are both pragmatic philosophers. They think at a high level but they are hands-on and have their feet firmly on ground realities. Inventing on principle is Bret Victor's contribution, but Rich Hickey surely lives it; and Hammock-Driven Development is Rich's notion, but there wouldn't be "Inventing on principle" without HDD on Bret's part. These two are awesome.
